Barely, you make a very good point. I had forgotten my basic science. I do admit, though, that if I had been there at that time, seeing a smoking lounge would have taken me aback. But you are right, it would have been far safer than it would initially seem.Odd as it may seem, the smoking room wasn't as dangerous as you would think - not only was the room airlocked & pressurized, but it was located at the bottom of the ship. As hydrogen rises the risk was almost nonexistent: Hindenburg Smoking Room
And it is a shame that they fell out of favor as they did. They would make one H**L of a luxury cruise ship. Forget ocean liners, that'd be a cool way to travel (using helium of course).